TK111xxCS
VOLTAGE REGULATOR WITH ON/OFF SWITCH
FEATURES
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High Precision Output Voltage (± 1.5% or ± 50 mV)
Active High On/Off Control
Very Low Dropout Voltage (V
DROP
= 103 mV at 100 mA)
Very Good Stability: CL = 0.1
mF
is Stable For Any Type
Capacitor with V
OUT
³
1.8 V (I
OUT
> 0.5 mA)
Excellent Ripple Rejection Ratio (80 dB @ 1 kHz)
Very Low Quiescent Current (I
Q
= 63
mA
at I
OUT
= 0 mA)
Peak Output Current is 320 mA
SOT23-5 Package
Wide Operating Voltage Range (1.8 V ~ 14 V)
Reverse Bias and Overcurrent Protection
Built-in Thermal Shutdown
Short Circuit Protection
APPLICATIONS
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Battery Powered Systems
Cellular Telephones
Pagers
Personal Communications Equipment
Portable Instrumentation
Portable Consumer Equipment
Radio Control Systems
Toys
The TK111xxC circuit features very high stability. An output
capacitor of 0.1
mF
provides stable operation for V
OUT
³
2.0
V. Any type of capacitor can be used; however, the larger
this capacitor is, the better the overall characteristics are.
The ripple rejection ratio is 84 dB at 400 Hz, and 80 dB at
1 kHz.
The TK111xxC is available in a SOT23-5 surface mount
package.
DESCRIPTION
The TK111xxC is a low dropout linear regulator with a built-
in electronic switch. The internal switch can be controlled by
TTL or CMOS logic levels. The device is in the “on” state
when the control pin is pulled to a logic high level. An
external capacitor can be connected to the noise bypass pin
to lower the output noise level to 30 µV
RMS
.
An internal PNP pass transistor is used to achieve a low
dropout voltage of 80 mV (typ.) at 50 mA load current. The
TK111xxC has a very low quiescent current of 63 µA (typ.)
at no load . The internal thermal shut down circuitry limits the
junction temperature to 150 °C. The load current is internally
monitored and the device will shut down in the presence of
a short circuit or overcurrent condition at the output.
TK111xxC
CONTROL
01 S
VIN
GND
NOISE BYPASS
VOUT
BLOCK DIAGRAM
VIN 5
VOUT
ORDERING INFORMATION
TK111
Voltage Code
Package Code
VOLTAGE CODE:
Refer to Table 1
CS
L
Tape/Reel Code
Temp. Code
CONTROL
CONTROL
CIRCUIT
CONSTANT
CURRENT
SOURCE
THERMAL &
OVER CURRENT
PROTECT
500 k
BANDGAP
REFERENCE
PACKAGE CODE:
S: SOT23-5
TAPE/REEL CODE:
L: Tape Left
Reel Size = 3000 pcs.
TEMP. CODE:
C: -30 ~ 80°C
I : -40 ~ 85°C
2
GND
NOISE
BYPASS
January 22, 2002 TOKO, Inc.
Page 1
TK111xxCS
ABSOLUTE MAXIMUM RATINGS TK111xxC (C RANK)
Supply Voltage ............................................... -0.4 to16 V
Noise Bypass Terminal Voltage ...................... -0.4 to 5 V
Power Dissipation (Note 1) ................................. 500 mW
Reverse Bias .................................................. -0.4 to 6 V
Storage Temperature Range ..................... -55 to +150 °C
Operating Temperature Range ..................... -30 to +80 °C
Operating Voltage Range ............................... 1.8 to 14 V
Control Pin Voltage ....................................... -0.4 to 16 V
Short Circuit Current ............................................ 360 mA
TK111xxCSC ELECTRICAL CHARACTERISTICS (C RANK)
Test conditions: V
IN
= V
OUT(TYP)
+ 1 V, V
CONT
³
1.8 V, T
A
= 25 °C, unless otherwise specified.
SYMBOL
V
OUT
Line Reg
PARAMETER
Output Voltage
Line Regulation
TEST CONDITIONS
See Table 1
D
V = 5 V (V
IN
= V
OUT(TYP)
+ 1 V to
V
OUT(TYP)
+ 6 V)
I
OUT
= 5 mA to100 mA (Note 2)
I
OUT
= 5 mA to 200 mA (Note 2)
I
OUT
= 50 mA
MIN
TYP
MAX
UNITS
0.3
11
27
80
120
200
230
240
320
250
63
0.0
1.0
5
28
64
140
210
350
350
mV
mV
mV
mV
mV
mV
mV
mA
mA
Load Reg
Load Regulation
V
DROP
Dropout Voltage (Note 3)
I
OUT
= 100 mA
I
OUT
= 200 mA (V
OUT
³
2.4 V)
I
OUT
= 180 mA (2.1 V
£
V
OUT
< 2.4 V)
I
OUTMAX
I
Q
I
STBY
I
GND
Maximum Output Current
Quiescent Current
Standby Current
Ground Pin Current
V
OUT
= V
OUT(TYP)
x 0.9
1.8 V
£
V
IN
£
2.1 V Reference Value
I
OUT
= 0 mA Excluding I
CONT
V
IN
= 8 V, V
CONT
£
0.15 V (Note 4)
I
OUT
= 50 mA
100
0.1
1.8
mA
mA
mA
CONTROL TERMINAL SPECIFICATIONS (Note 4)
I
CONT
V
CONT
Control Current
Control Voltage On
OFF State
Noise Bypass Terminal
Voltage
Temperature Coefficient
1.28
35
0.6
V
V
ppm / °C
V
CONT
= 1.8 V, Output ON
ON State
1.6
5
15
µA
V
V
REF
DV
OUT
/
DT
A
Page 2
January 22, 2002 TOKO, Inc.
TK111xxCS
TK111xxCSC ELECTRICAL CHARACTERISTICS - C RANK (CONT)
Test conditions: V
IN
= V
OUT(TYP)
+ 1 V, V
CONT
³
1.8 V, T
A
= 25 °C, unless otherwise specified.
SYMBOL
V
NO
PARAMETER
Output Noise
TEST CONDITIONS
V
OUT
= 3 V, f = 1 kHz
V
OUT
= 3 V, at BW 400 Hz to 80 kHz
f = 400 Hz, CL = 1.0
m
F, C
N
= 0.01
m
F,
V
NOISE
= 200 mV
RMS
, V
IN
= V
OUT(TYP)
+ 1.5
V, I
OUT
= 10 mA
f = 1 kHz, CL = 1.0
m
F, C
N
= 0.01
m
F,
V
NOISE
= 200 mV
RMS
, V
IN
= V
OUT(TYP)
+ 1.5
V, I
OUT
= 10 mA
MIN
TYP
0.20
45
84
MAX
UNITS
m
V /
Ö
Hz
mV
RMS
dB
RR
Ripple Rejection
80
dB
Note 1: Power dissipation is 150 mW in free air. Power dissipation is 500 mW when mounted as recommended. Derate at 4.0 mW / °C for
operation above 25 °C.
Note 2: This value depends on the output voltage. (This is a value for a V
OUT
= 3 V device.)
Note 3: The minimum operating Voltage for V
IN
can be 2.1 V. Also, the minimum voltage required for V
IN
is V
IN
= V
DROP
+ V
OUT
. As a result,
operating at V
OUT
£
2.0 V at the minimum operating voltage is not preferred.
Note 4: The input current decreases to the pA level by connecting the control terminal to GND (Off State). The internal pull-down resistor is 500 KW.
General Note: Parameters with only typical values are just reference. (Not guaranteed)
General Note: Limits are guaranteed by production testing or correction techniques using Statistical Quality Control (SQC) methods. Unless
otherwise noted, V
IN
= V
OUT(TYP)
+ 1 V, I
OUT
= 5 mA (Tj = 25 °C). The operation of -30 °C to + 80 °C is guaranteed in the design by
a usual inspection.
General Note: Exceeding the “Absolute Maximum Rating” may damage the device.
General Note: Connecting a capacitor to the noise bypass pin can decrease the output noise voltage.
January 22, 2002 TOKO, Inc.
Page 3
TK111xxCS
ABSOLUTE MAXIMUM RATINGS TK111xxC
Supply Voltage ............................................... -0.4 to16 V
Noise Bypass Terminal Voltage ...................... -0.4 to 5 V
Power Dissipation (Note 1) ................................. 500 mW
Reverse Bias .................................................. -0.4 to 6 V
Storage Temperature Range ..................... -55 to +150 °C
Operating Temperature Range ..................... -40 to +85 °C
Operating Voltage Range ............................... 2.1 to 14 V
Control Pin Voltage ....................................... -0.4 to 16 V
Short Circuit Current ............................................ 360 mA
TK111xxCSI ELECTRICAL CHARACTERISTICS (I RANK)
Test conditions: V
IN
= V
OUT(TYP)
+ 1 V, I
OUT
= 5 mA, T
A
= 25 °C, Boldfaced type specifications apply over the full operating
temperature Rang (-40 to +85 °C).
SYMBOL
V
OUT
Line Reg
PARAMETER
Output Voltage
Line Regulation
TEST CONDITIONS
See Table 1
D
V = 5 V, (V
VIN
= V
OUT(TYP)
+ 1 V to
V
OUT(TYP)
+ 6 V)
MIN
TYP
MAX
UNITS
0.3
5
mV
8
11
I
OUT
= 5 mA to100 mA (Note 2)
Load Reg
Load Regulation
27
I
OUT
= 5 mA to 200 mA (Note 2)
80
I
OUT
= 50 mA
120
I
OUT
= 100 mA
V
DROP
Dropout Voltage (Note 3)
I
OUT
= 200 mA (V
OUT
³
2.4 V)
200
28
mV
34
64
mV
90
140
mV
180
210
mV
270
350
390
mV
I
OUT
= 180 mA (2.1 V
£
V
OUT
< 2.4 V)
240
I
OUT(MAX)
Maximum Output Current
V
OUT
= V
OUT(TYP)
x 0.9
220
230
350
390
mV
320
mA
63
I
Q
Quiescent Current
I
OUT
= 0 mA Excluding I
CONT
V
CC
= 8 V, V
CONT
£
0.15 V (OFF State)
(Note 4)
I
OUT
= 50 mA
0.0
100
120
0.1
0.5
mA
mA
I
STBY
I
GND
Page 4
Standby Current
Ground Pin Current
1.0
1.8
mA
January 22, 2002 TOKO, Inc.
TK111xxCS
TK111xxCSI ELECTRICAL CHARACTERISTICS - I RANK (CONT)
Test conditions: V
IN
= V
OUT(TYP)
+ 1 V, I
OUT
= 5 mA, T
A
= 25 °C, Boldfaced type specifications apply over the full operating
temperature Rang (-40 to +85 °C).
SYMBOL
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNITS
CONTROL TERMINAL SPECIFICATIONS (Note 4)
I
CONT
Control Current
V
CONT
= 1.8 V, Output ON
ON State
V
CONT
Control Voltage
OFF State
0.6
0.35
V
REF
DV
OUT
/
DT
A
V
NO
Noise Bypass Terminal
Voltage
Temperature Coefficient
Output Noise Voltage
V
OUT
= 3 V, f = 1kHz
V
OUT
= 3 V, at BW 400 Hz to 80 kHz
f = 400 Hz, CL = 1.0
m
F, C
N
= 0.01
m
F,
V
NOISE
= 200 mV
RMS
, V
IN
= V
OUT(TYP)
+
1.5 V, I
OUT
= 10 mA
RR
Ripple Rejection
f = 1 kHz, CL = 1.0
m
F, C
N
= 0.01
m
F,
V
NOISE
= 200 mV
RMS
, V
IN
= V
OUT(TYP)
+
1.5 V, I
OUT
= 10 mA
1.28
25
0.20
45
84
V
ppm / °C
m
V /
Ö
Hz
mV
RMS
dB
V
1.6
V
1.9
5
15
µA
80
dB
Note 1: Power dissipation is 150 mW in free air. Power dissipation is 500 mW when mounted as recommended. Derate at 4.0 mW / °C for
operation above 25 °C.
Note 2: This value depends on the output voltage. (This is a value for a V
OUT
= 3 V device.)
Note 3: The minimum operating Voltage for V
IN
can be 2.1 V. Also, the minimum voltage required for V
IN
is V
IN
= V
DROP
+ V
OUT
. As a result,
operating at V
OUT
£
2.0 V at the minimum operating voltage is not preferred.
Note 4: The input current decreases to the pA level by connecting the control terminal to GND (Off State). The internal pull-down resistor is 500 KW.
General Note: Parameters with only typical values are just reference. (Not guaranteed)
General Note: Limits are guaranteed by production testing or correction techniques using Statistical Quality Control (SQC) methods. Unless
otherwise noted, V
IN
= V
OUT(TYP)
+ 1 V, I
OUT
= 5 mA (Tj = 25 °C). The operation of -40 °C to + 85 °C is guaranteed in the design by
a usual inspection.
General Note: Exceeding the “Absolute Maximum Rating” may damage the device.
General Note: Connecting a capacitor to the noise bypass pin can decrease the output noise voltage.
January 22, 2002 TOKO, Inc.
Page 5
